Naming and Classifying Angles

Name all the angles in the image.

• ∠C, ∠Y, ∠A, and ∠B

• ∠CBY and ∠YBA

• ∠CBA

• ∠CBA, ∠CBY, and ∠YBA

Define Obtuse Angle

• Less than 90

• Exactly 90

• Greater than 90 and less than 180

• Exactly 180

Define Acute Angle

• Less than 90

• Exactly 90

• Greater than 90 and less than 180

• Exactly 180

Define Right Angle

• Less than 90

• Exactly 90

• Greater than 90 and less than 180

• Exactly 180

Define Straight Angle

• Less than 90

• Exactly 90

• Greater than 90 and less than 180

• Exactly 180

Right, acute, or obtuse?

• Right

• Acute

• Obtuse

The Vertex is which letter?

• A

• B

• C

• None of the above